Why is is so hard to find an OBDII based performance gauge?
I am looking for a simple performance gauge. I want something that can log vehicle speed, or rpm versus time so I can compare performance before/after mods. The trouble is the only performance gauges I can find use a G-force meter to measure acceleration, and I don't want that. I just want something that can read vehicle speed and rpm from the OBDII port and either log it with time values, or just tell me various perfomance metrics (0-60, 60-0, etc).
So my question is, why are all performance meters accelerometer based rather than OBDII based?
So my question is, why are all performance meters accelerometer based rather than OBDII based?